145032409 has 2 divisors, whose sum is σ = 145032410. Its totient is φ = 145032408.

The previous prime is 145032383. The next prime is 145032413. The reversal of 145032409 is 904230541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144072009 + 960400 = 12003^2 + 980^2 .

It is an emirp because it is prime and its reverse (904230541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145032409 - 2¹⁵ = 144999641 is a prime.

It is not a weakly prime, because it can be changed into another prime (145032439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72516204 + 72516205.

It is an arithmetic number, because the mean of its divisors is an integer number (72516205).

Almost surely, 2^145032409 is an apocalyptic number.

It is an amenable number.

145032409 is a deficient number, since it is larger than the sum of its proper divisors (1).

145032409 is an equidigital number, since it uses as much as digits as its factorization.

145032409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 145032409 is about 12042.9402140839. The cubic root of 145032409 is about 525.3979253747.

The spelling of 145032409 in words is "one hundred forty-five million, thirty-two thousand, four hundred nine".